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单选题The effect of high vapor superheat in a refrigeration system, is a/an （）.A increased capacity of the compressorB more efficient operation of the thermal expansion valveC decreased capacity of the compressorD loss of receiver capacity

题目
单选题
The effect of high vapor superheat in a refrigeration system, is a/an （）.
A

increased capacity of the compressor

B

more efficient operation of the thermal expansion valve

C

decreased capacity of the compressor

D

loss of receiver capacity

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相似问题和答案

第1题：

If a refrigeration system were short of refrigerant, the condition would result in

A.continuous running of the compressor

B.high suction pressure

C.high discharge pressure

D.short cycling of the compressor on the water failure switch


正确答案：A

第2题：

单选题
A heated bulkhead has the effect on a hygroscopic commodity of（）.
A

causing moisture to accumulate against the bulkhead

B

lowering the vapor pressure of the commodity

C

lowering the dew point of the air

D

raising the vapor pressure of the commodity


正确答案： C
解析： 暂无解析

第3题：

The expansion valve used in a refrigeration system regulates the

A.superheat of the gas leaving the compressor

B.back pressure in the evaporator

C.temperature in the refrigerated space

D.degree of superheat of the gas leaving the evaporator


正确答案：D

第4题：

单选题
In the refrigeration system, a shortage of refrigerant is indicated by （）.
A

the compressor short cycling on high pressure cut out switch

B

high suction pressure

C

high head pressure

D

bubbles in the sight glass


正确答案： B
解析： 暂无解析

第5题：

单选题
The only means of removing the latent heat of condensation from a refrigerant in the normal refrigeration cycle is by （）.
A

passing it through the expansion valve

B

condensing refrigerant in the system condenser

C

passing the gaseous refrigerant through the heat interchanger on the suction side of the compressor

D

maintaining a high pressure on the systems receiver


正确答案： C
解析： 暂无解析

第6题：

单选题
In a vapor compression refrigeration the evaporating pressure is maintained constant by the action of the （）, which removes vapor from the evaporator at the same rate at which it is formed.
A

evaporator

B

compressor

C

condenser

D

none of the above


正确答案： C
解析： 暂无解析

第7题：

单选题
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
A

A shortage of liquid refrigerant

B

Excessive frost on the evaporator

C

Excessive condenser cooling water

D

Insufficient condenser cooling water flow


正确答案： C
解析： 暂无解析

第8题：

In the refrigeration system, a shortage of refrigerant is indicated by

A.the compressor short cycling on high pressure cut out switch

B.high suction pressure

C.high head pressure

D.bubbles in the sight glass


正确答案：D

第9题：

单选题
The refrigeration compressor in a water cooled refrigeration system is short cycling on the high pressure cutout switch， One reason for this could be the （）.
A

system is low on refrigerant

B

high pressure cutout switch is improperly adjusted

C

discharge valves are leaking slightly

D

discharge valves are leaking excessively


正确答案： A
解析： 暂无解析

第10题：

单选题
A liquid indicator sight glass is useful in determining whether or not a refrigeration system is sufficiently chargedIt is generally located in the（）.
A

high pressure liquid line

B

low pressure liquid line

C

high pressure vapor line

D

low pressure vapor line


正确答案： A
解析： 暂无解析

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